So now you have not even seen the new system and you have not felt how it worked out, yet you can say that the new system is childish? It seems to me like you are just afraid of changes. They may have changed the way combat works in Civ V, but then again the combat in Civ was never really one of the strong points. In Civ IV I think the warring is very poor, even though I think the promotions were a nice touch. In Civ V I hope they will have brushed up the boring combat a little bit. I am unsure if it will work in a brilliant way, but it will require more thinking than it did in Civ IV. This alone will make the combat in V more exciting. Add to that the fact that you now need to defend your land and not just your cities and it is clear to me that the combat will be more engaging and less generic than in previous installments of Civ.
As to the childish comments, I am unsure how the 1upt and risk are similar. Risk has no connection to CIv whatsoever. The new system does not mimic Risk in any way. Also I do not understand why companies with high profiles should make no changes to games. Also I do not think the appeal of football has anything to do with the rles, and for your information the rules of football have changes a lot over the past few years. Offside was changed a few times, now goalies can no longer take a ball into their hands if it comes from the foot of their own defender, the booking system was changed since pulling of your shirt is now an automatic yellow card, etc. Your statements therefore obviously do not make a lot of sense, and at the very least they are not based on facts.
Sure it will be sad if they should change the hammer food and commerce system too, but then again that system is means to an end. I think it worked fine so it deserves to be there in the next game as well, but if they changed it to something else you would not see me crying over it, as long as the new system would be similar in usefulness.